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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72a2dbb8c6c2b22ae0e316b96a05acaa9d3f64a6ecb5ce2e2f33447d24962626' 
  AND token = 'Jse/9QgXgeBZnAfoQGBwy5hNKD9HGfcY4zck9/gPPhM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}